For tuning you will want to get some good bushing and some good king pins.
First start out with the king pins remove the stock king pins from you trucks. Next you will want some bushings. Try some Infinityfingerboards bushings they are great. now put the top bushing then your hanger( the thing that you put your wheels on) and then put you bottom bushing on and screw it onto the base plate.
There you goo now you have a well tuned truck for your setup.